Make a windowed game borderless fullscreen from a Stream Deck key
To make a windowed game borderless fullscreen, add Borderless Fullscreen Keys to your Stream Deck and press its key while the game is in front. The title bar and frame of the active window come off and it stretches over the screen, or becomes a borderless window of a fixed size, and another press puts it back as it was.
Stream Deck plugin · Works on Windows 10 or later with the Stream Deck app 6.9 or later.
What you can do
Fill the screen: Borderless Fullscreen makes the active window fill its screen, or a screen you choose, over the taskbar or up to it.
Get an exact size: Borderless Window takes the frame off at the same size or at an exact size such as 1920 x 1080, for streaming and recording.
Undo in one press: press again to put the window back, or press Restore Windows to put back every changed window; the key shows how many.
See what a press will do: the key shows the window name and FULL or WINDOWED.
Safe to try: frame, position and size are saved before a change, and when Stream Deck closes, changed windows are put back first.
Leaves Windows alone: the desktop, the taskbar, the Stream Deck app and minimized windows are never changed.
Private: it reads the title and size of the active window only to show them on the key. Nothing is sent anywhere.
English and Japanese.
How it works
Install the plugin from the Elgato Marketplace. In the Stream Deck app, drag Borderless Fullscreen or Borderless Window onto a key.
Start your game or app in windowed mode and click it so that it is in front. The key shows its name and WINDOWED.
Press the key. Press it again, with that window in front, to put the window back.
The plugin switches off the window's title bar and frame and sets its position and size, then reads the window back and shows FULL only when Windows reports exactly that.
How do I make a windowed game borderless fullscreen with a Stream Deck?
Put a Borderless Fullscreen key on your Stream Deck, start the game in windowed mode, click it so it is in front, and press the key. The frame comes off and the window fills the screen; press again to put it back.
Can I make a window an exact size, like 1920 x 1080?
Yes. Borderless Window can set an exact size, such as 1920 x 1080 or your own width and height, and puts the window in the middle of its screen.
Can I keep the taskbar visible?
Yes. Set Fill to Up to the taskbar and the window fills the screen up to it. With The whole screen, the window goes over the taskbar.
What if a window stays without its frame?
Bring that window to the front and press the key again, or press a Restore Windows key. Both put back the title bar, frame, position, size and maximized state the window had before.
Does it change any game or Windows setting?
No. Only the open window is changed; no Windows setting and no file of the program is changed.
Limits
Borderless windowed mode, not exclusive full screen; the game keeps the resolution of the desktop.
Some programs draw their own frame or keep a fixed size; a change the window rejects is undone.
A window of a program that runs as administrator is expected to stay as it was.
A window is changed only when you press a key, not automatically when a game starts.
Games with anti-cheat software: if you are unsure, check the rules of your game before you use it there.
